Pyrite ore usually includes three ores of pyrite, pyrrhotite and pyrite. Because it is very buoyant in nature, it is easy to react with the effective collector xanthate of sulfide minerals in general, and it is hydrophobic to form double xanthate. Therefore, flotation method is generally used in the ore beneficiation process. This method is undoubtedly a good method, but because the flotation method is to separate the sulfide mineral monomer from the gangue, the flotation process must be carried out under a finer particle size, and the production cost is higher, so some low-grade pyrite Because of the inability to obtain economic benefits, ore is discarded and piled up in the mine with tailings; some mines have high sulfur content, and it is difficult to achieve effective sulfur due to the chemical system or the need to add a large amount of activator and collector. Recycling. Cause waste of resources and environmental pollution.

In view of mine low-grade pyrite, we have developed a variety of simple processes, small equipment investment, low production cost and low sulfur recovery according to the obvious difference in proportion between pyrite and pyrite. Iron ore re-election new process beneficiation process and new equipment. Bringing significant economic benefits to the company.

Between 2002 and 2004, for the dense massive pyrite ore deposited in the Yunfu Pyrite Mine mining area, the largest pyrite production base in China, the classification-coarse jigging-fine grain spiral was adopted under the condition of non-grinding. The re-election process, when the ore contains sulphur 28.0.0%, obtains a classification index of 37.11% sulfur and a recovery rate of 84.06%. This process is an effective means for dealing with low-grade pyrite ore.

The late 1980s, a copper mine, ore sulfur content of up to 30%, due to the system and other agents, sulfur flotation recovery of only 40%, the loss of a large number of pyrite, about the loss of 50,000 tons of iron ore per year yellow In the tailings. In order to make full use of the resources, we use the method of re-election of pyrite produced by us to recover the pyrite from the on-site floating sulfur tailings. After the scheme design and research comparison, we have determined the reasonable process equipment and completed the re-election. The design, installation and commissioning of the recovered pyrite will enable the mine to recover 44,400 tons of standard sulfur concentrate per year, and the net net benefit will be 2.723 million. In addition, due to the reduction of tailings transportation costs, increase the service life of the tailings dam and reduce the environment. The annual net increase in pollution and other benefits was 4 million yuan. According to the current price of sulfur, the direct annual net increase benefit can reach 10 million yuan. This method has a simple process, convenient operation, investment, quick, small footprint, processing equipment itself without power consumption and other characteristics of multi-metal sulfide ore to promote universal values, by experts, a domestic initiative, won Ministerial Science and Technology Progress Award.

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